It shouldn't matter when you've purchased her. If you can log in to the Captain Sim site (http://www.captainsim.com/cgi-bin/login.pl), you can always click the 'get new links' thingy and receive a fresh 4.6 installer. If that doesn't work, the ticket makes sense.

Note. This is for download customers having purchased the plane at the Captain Sim shop. Third party shops are handled differently. But if you have an Order Number (don't post it!) from CS, you should be ok.